Some people — no matter how many times they brush their teeth — have teeth stains from habits like drinking coffee or tea and/or smoking. Oftentimes yellow- or brown-tinted teeth can also point to a larger problem: unhealthy gums, thinning enamel and overall poor dental hygiene. Whitening the teeth alone won’t help protect the teeth or gums from cavities or diseases, such as gingivitis — so while white teeth are certainly a nice thing to have, it helps to keep things in perspective.
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